Stop space agency recall of Helen Sharman, for one? (6)
I believe the answer is:
nasard
'recall of helen sharman for one?' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'stop space agency' is the wordplay.
I cannot quite see how this works, but
'space agency' could be 'nasa' (I've seen this before) and 'nasa' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for nasard that I've seen is " Organ stop".)